Marine actinobacteria showing phosphate-solubilizing efficiency in Chorao Island, Goa, India

Show simple item record Dastager, S.G. Damare, S.R. 2013-04-25T12:09:01Z 2013-04-25T12:09:01Z 2013
dc.identifier.citation Current Microbiology, vol.66(5); 2013; 421-427
dc.description.abstract The occurrence and distribution of an actinobacteria group of bacteria capable of dissolving insoluble phosphates were investigated in this study in marine environments, especially in sediments of Chorao Island, Goa, India. A total of 200 bacterial isolates of actinobacteria was isolated. All isolates were screened for phosphate-solubilizing activity on Pikovskaya's agar. Thirteen different isolates exhibiting maximum formation of halos (zone of solubilization) around the bacterial colonies were selected for quantitative estimations of P-solubilization. Quantitative estimations for P-solubilization were analyzed for up to 10 days at intervals of 24 h. Maximum solubilization from 89.3 plus or minus 3.1 to 164.1 plus or minus 4.1 mu g ml sup(-1) was observed after 6 days of incubation in six of all isolates, while the isolate NII-1020 showed maximum P-solubilization. The increase in solubilization coincided with the drop in pH. Many of these species showed wide range of tolerance to temperature, pH, and salt concentrations. Further, 16S rRNA gene sequence analyses were carried to identify the bacterial groups which are actively solubilized phosphate in vitro. Gene sequencing results reveal that all isolates were clustered into six different actinobacterial genera: Streptomyces, Microbacterium, Angustibacter, Kocuria, Isoptericola, and Agromyces. The presence of phosphate-solubilizing microorganisms and their ability to solubilize phosphate were indicative of the important role played by bacteria in the biogeochemical cycle of phosphorus and the plant growth in coastal ecosystems.
dc.language.iso en
dc.publisher Springer
dc.rights An edited version of this paper was published by Springer. This paper is for R & D purpose and Copyright [2013] Springer.
dc.subject bacteria
dc.subject Streptomyces
dc.subject ecosystems
dc.subject Angustibacter
dc.title Marine actinobacteria showing phosphate-solubilizing efficiency in Chorao Island, Goa, India
dc.type Journal Article

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